Controlled, ice-cored moraines: sediments and geomorphology. An example from Ragnarbreen, Svalbard

Auteur(s) et Affiliation(s)



Description :
End moraine of the Ragnarbreen consists of 3 subzones: (1) outer moraine ridge, (2) culmination moraine ridge and (3) inner moraine plateau. Reworking processes were and still are the main factor influencing the morphology and sediment distribution in this end moraine complex. However, the intensity of gravity flows is much lower now than it was in the early stages of end moraine complex development. The stability of the ice-cored moraines is due mainly to the thickness of the covering debris, which protects the ice from melting. The occurrence of fine sediments on the contemporary hills suggests that the end moraine complex has undergone at least one cycle of topographic inversion. The analysis of landforms and deposits occurring in the end moraine complex of the Ragnarbreen revealed patterns in the morphology such as the lineation of hillocks and depressions, parallel to the edge of the moraine complex.


Type de document :
Article de périodique

Source :
Zeitschrift für Geomorphologie, issn : 0372-8854, 2012, vol. 56, n°. 1, p. 53-74, nombre de pages : 22, Références bibliographiques : 2 p.

Date :
2012

Editeur :
Pays édition : Allemagne, Stuttgart, Gebruder Borntraeger